Conduit support structure for an industrial machine with saddle block

ABSTRACT

An industrial machine includes a frame having a base and a boom, an arm movably coupled to the boom, an attachment, a conduit, a first member, and a second member. The boom has a first end coupled to the base and a second end opposite the first end. The arm includes a first end and a second end. The attachment is coupled to the first end of the arm. The conduit extends from the frame to the arm. The first member is pivotably coupled to the frame and supports a first portion of the conduit as the arm moves relative to the boom. The second member is pivotably coupled between the first member and the arm, and supports a second portion of the conduit as the arm moves relative to the boom.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of U.S. Provisional PatentApplication No. 61/763,099, filed Feb. 11, 2013, U.S. Provisional PatentApplication No. 61/789,361, filed Mar. 15, 2013, and U.S. ProvisionalPatent Application No. 61/846,918, filed Jul. 16, 2013. The entirecontents of these applications are incorporated by reference herein.

BACKGROUND

The present invention relates to industrial machines. Specifically, thepresent invention relates to a conduit support system for an earthmovingmachine.

Conventional rope shovels include a boom and a handle coupled to theboom for rotational and translational movement. A bucket or dipper isattached to the handle and is supported by a cable or rope that passesover an end of the boom. The rope is secured to a bail that is pivotablycoupled to the dipper. During the hoist phase, the rope is reeled in bya hoist drum, upwardly lifting the dipper through a bank of material andliberating a portion of the material. Generally, the orientation of thedipper relative to the handle is fixed and is not controlledindependently of the handle and the hoist rope.

SUMMARY

In one aspect, the invention provides an industrial machine including aframe having a base and a boom, an arm movably coupled to the boom, anattachment, a conduit, a first member, and a second member. The boom hasa first end coupled to the base and a second end opposite the first end.The arm includes a first end and a second end. The attachment is coupledto the first end of the arm. The conduit extends from the frame to theattachment. The first member is pivotably coupled to the frame andsupports a first portion of the conduit as the arm moves relative to theboom. The second member is pivotably coupled between the first memberand the arm, and supports a second portion of the conduit as the armmoves relative to the boom.

In another aspect, the invention provides a conduit support system foran industrial machine having a frame supporting a boom, an arm having afirst end and a second end and supported for translational androtational movement relative to the boom, and an attachment coupled tothe first end of the arm. The conduit support system includes a conduitfor providing communication between a source on the frame and theattachment, a first member, and a second member. The first member isconfigured to be pivotably coupled to the frame and supports a firstportion of the conduit. The second member is configured to be pivotablycoupled to the arm and is movable relative to the first member. Thesecond member supports a second portion of the conduit.

In yet another aspect, the invention provides an industrial machineincluding a frame having a base and a boom coupled to the base, an armmovably coupled to the boom, a conduit extending between the frame andthe arm, and a support structure. The boom has a first end and a secondend opposite the first end. The arm includes a first end, a second end,and an attachment coupled to the first end of the arm. The supportstructure is coupled to at least a portion of the conduit. The supportstructure is movable relative to at least one of the frame and the armto support the conduit in response to movement of the arm relative tothe frame.

Other aspects of the invention will become apparent by consideration ofthe detailed description and accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a mining shovel.

FIG. 2 is a perspective view of a handle, a bucket, saddle blocks, and ashipper shaft of the shovel shown in FIG. 1.

FIG. 3 is an enlarged perspective view of a conduit support structure.

FIG. 4 is a lower perspective view of the conduit support structure ofFIG. 3 and a portion of a handle.

FIG. 5 is a side view of the shovel of FIG. 1, with the handle in araised, retracted position.

FIG. 6 is a side view of the shovel of FIG. 1, with the handle in alowered, extended position.

FIG. 7 is a side view of the shovel of FIG. 1, with the handle in araised, extended position.

FIG. 8 is a perspective view of a mining shovel including a conduitsupport structure according to another embodiment.

FIG. 9 is a top view of a portion of the shovel and the conduit supportstructure of FIG. 8.

FIG. 10 is a perspective view of a mining shovel including a conduitsupport structure according to another embodiment.

FIG. 11 is a side view of the mining shovel and conduit supportstructure of FIG. 10.

FIG. 12 is a perspective view of the conduit support structure of FIG.10.

FIG. 13 is a perspective view of a mining shovel including a conduitsupport structure according to another embodiment.

FIG. 14 is a side view of the mining shovel and conduit supportstructure of FIG. 13.

FIG. 15 is a side view of a portion of a mining shovel including aconduit support structure according to another embodiment, with thehandle in a retracted position.

FIG. 16 is a side view of the portion of the mining shovel and theconduit support structure of FIG. 15, with the handle in an extendedposition.

FIG. 17 is a side view of a portion of a mining shovel including aconduit support structure according to another embodiment, with thehandle in a retracted position.

FIG. 18 is a side view of the portion of the mining shovel and conduitsupport structure of FIG. 17, with the handle in a lowered extendedposition.

FIG. 19 is a side view of the portion of the mining shovel and conduitsupport structure of FIG. 17, with the handle in a raised extendedposition.

FIG. 20 is a side view of a mining shovel including a conduit supportstructure according to another embodiment.

FIG. 21 is a side view of the mining shovel and the conduit supportstructure of FIG. 20.

Before any embodiments of the invention are explained in detail, it isto be understood that the invention is not limited in its application tothe details of construction and the arrangement of components set forthin the following description or illustrated in the following drawings.The invention is capable of other embodiments and of being practiced orof being carried out in various ways. Also, it is to be understood thatthe phraseology and terminology used herein is for the purpose ofdescription and should not be regarded as limiting.

DETAILED DESCRIPTION

FIG. 1 shows an industrial machine, such as a mining shovel 10,supported by tracks 14 a support surface or ground (not shown). Theshovel 10 includes a frame 18 including a base 22 supporting a boom 26and a fluid source 30 (e.g., a fluid pump and/or reservoir—FIG. 3). Theshovel 10 further includes an elongated member or handle 34, anattachment or bucket 38 including pivot actuators 42, and a conduitsupport structure 46. The base 22 includes a rotational structure forrotating about an axis of rotation (not shown) that is generallyperpendicular to a plane corresponding to a grade of the supportsurface. The base 22 also includes a hoist drum 50 for reeling in andpaying out a cable or rope 54. Although the conduit support structure 46is described with respect to the shovel 10, the linkage 46 may be usedon other industrial machines, including other mining machines.

The boom 26 includes a first end 58 coupled to the base 22 and a secondend 62 opposite the first end 58. In the illustrated embodiment, thefirst end 58 is pivotable relative to the base 22 by a pin joint. Theboom 26 further includes a boom sheave 66 coupled to the second end 62.The boom sheave 66 guides the rope 54 over the second end 62 of the boom26. The rope 54 is coupled to the bucket 38 by a bail assembly 70, whichis pivotably coupled to the bucket 38 in the illustrated embodiment. Thebucket 38 moves toward the boom sheave 66 as the rope 54 is reeled in bythe hoist drum 50 and the bucket 38 moves away from the boom sheave 66as the rope 54 is paid out. In some embodiments, the bail assembly 70includes an equalizer for maintaining the rope 54 in an orientation thatis generally tangent to the boom sheave 66.

The boom 26 also includes a shipper shaft 74 and a pair of saddle blocks78. The shipper shaft 74 extends through the boom 26 and is positionedbetween the first end 58 and the second end 62 of the boom 26. In theillustrated embodiment, the shipper shaft 74 is rotatable about an axisdefined by the shipper shaft 74 and oriented transverse to alongitudinal axis of the boom 26. The shipper shaft 74 includes pinions82 (FIG. 2). The saddle blocks 78 are rotatably coupled to the shippershaft 74 and are rotatable relative to the boom 26. In one embodiment,each saddle block 78 is a three-piece saddle block having two parallelside portions and a top portion extending between the side portions.

As shown in FIG. 2, the handle 34 includes a pair of parallel arms 86and defines a first end 90 and a second end 94. The first end 90 ispivotably coupled to the bucket 38. The second end 94 is movablyreceived in the saddle blocks 78. In the illustrated embodiment, thehandle arms 86 are positioned on either side of the boom 26 (FIG. 1) andmovably pass through each saddle block 78 such that the handle 34 iscapable of rotational and translational movement relative to the boom26. Hoisting of the ropes 54 rotates the handle 34 and saddle block 78about the shipper shaft 74 relative to the boom 26. The handle 30 isalso linearly extendable relative to the saddle block 58. In theillustrated embodiment, each arm 86 includes a rack 98 for engaging apinion 82 of the shipper shaft 74, forming a rack-and-pinion couplingbetween the handle 34 and the boom 26. Rotation of the shipper shaft 74about its axis moves the rack 98 along the shipper shaft 74,facilitating translational movement of the handle 34 relative to theboom 26.

The bucket 38 is used to excavate a desired work area, collect material,and transfer the collected material to a desired location (e.g., amaterial handling vehicle). The bucket 38 includes teeth 102 forengaging a bank of material. Each pivot actuator 42 is coupled betweenthe bucket 38 and the handle 34 and actively controls the pitch of thebucket 38 (i.e., the angle of the bucket 38 relative to the handle 34)by rotating the bucket 38 about the handle first end 90. In theillustrated embodiment, the pivot actuators 42 are hydraulic cylinders.Also, in the illustrated embodiment, the bucket 38 is a clamshell-typebucket 38 having a rear wall 106 and a main body 110 movable relative tothe rear wall 106. The main body 110 is selectively moved away from therear wall 106 to empty the contents of the bucket 38. The main body 110may be actuated by one or more bucket cylinders (not shown). In otherembodiments, the shovel 10 may include other types of attachments,buckets, or dippers.

Referring to FIG. 3, the conduit support structure 46 includes firstmember or link 118 and a second member or link 122. In the illustratedembodiment, the support structure 46 includes a pair of links 118, 122,each of which is coupled to one of the handle arms 86. The first link118 is pivotably coupled between the frame 18 and the second link 122,and the second link 122 is pivotably coupled between the first link 118and the handle arm 86. The links 118, 122 are coupled to each other at ajoint 154. In the illustrated embodiment, the joint 154 and the jointscoupling the links 118, 122 to the shovel are pin joints; in otherembodiments, the joints may be a spherical bearing, a ball-in-socketconnection, or some other type of joint. Conduits 126 extendsubstantially along the length of the first link 118 and the second link122. The conduits 126 are coupled to the first link 118 and the secondlink 122 and bend around the joint 154 between the first link 118 andthe second link 122. In the illustrated embodiment, the portions of theconduits 126 that are coupled to the links 118, 122 are fixed tubes, anda flexible portion extends around the connection between the links 118,122. The flexible portion is prevented from bending beyond a minimumbend radius of the conduit in response to movement of the handle 34.

As shown in FIG. 4, the second link 122 includes a first portion 122 a,a second portion 122 b pivotably coupled to the first portion 122 a, andan attachment plate 130 secured to the handle arm 86. The attachmentplate 130 is pivotably coupled to the second portion 122 b, such as by aspherical bushing or a cylindrical bushing. While the second link 122pivots about a first axis 134 relative to the first link 118, the secondportion 122 b pivots about a second axis 138 relative to the firstportion 122 a. The conduits 126 bend around the connection between thefirst portion 122 a and the second portion 122 b. During operation ofthe shovel 10, the sides of the bucket 38 may be unevenly loaded,causing the handle 34 to deflect laterally relative to the saddle blocks78 or move in a plane that is generally perpendicular to a longitudinalaxis of the handle 34. The pivotable coupling between the first portion122 a and the second portion 122 b provides an additional direction ofarticulation to accommodate lateral or torsional motion of the handle 34and prevents the first link 118 and the second link 122 from binding. Inthe illustrated embodiment, the second axis 138 is perpendicular to thefirst axis 134. In other embodiments, the second axis 138 may bepositioned at another angle relative to the first axis 134. In stillother embodiments, the second link 122 may be formed as a solid memberwithout articulating portions 122 a and 122 b.

In one embodiment, the movement of the links 118, 122 relative to oneanother may be limited (e.g., by a mechanical stop) to never move beyonda minimum angle between the first link 118 and the second link 122 sothat the conduits 126 do not bend beyond a minimum bend radius. In otherembodiments, the coupling between the first link 118 and the second link122 may include a rotary union or fluid swivel to provide fluidcommunication between the portion of each conduit 126 coupled to thefirst link 118 and the portion of each conduit 126 coupled to the secondlink 122. The rotary union eliminates the need for a flexible conduitportion and provides fluid flow through the conduits 126 when thearticulating links 118, 122 are in virtually any position, without beinglimited by a bend radius of the conduits 126. Finally, in theillustrated embodiment, the conduit support structure 46 is notindependently powered, but instead follows the motion of the handle 34as the handle 34 is driven by the crowd and hoist forces. In otherembodiments, the links 118, 122 are driven to pivot by an independentpower source in response to movement of the handle 34.

In the embodiment of FIG. 3, the conduits 126 are in fluid communicationwith the fluid source 30 positioned on the base 22. The conduits 126 arealso in fluid communication with second conduits 140 extending along thehandle 34 and providing fluid to the pivot actuators 42 (FIG. 2) andbucket cylinders. In addition, the conduits 126, 140 may transmitmultiple types of fluids in separate lines at different pressures. Theconduits 126, 140 may convey lubricative medium (e.g., grease) to thehandle 34 in order to lubricate mechanical connections on the handle 34and bucket 38. The lubrication medium may include liquid, solid, orsemi-solid lubricant. In still other embodiments, the conduits 126, 140provide electrical communication between the bucket 38 and the frame 18to convey signals between the bucket 38 and a controller and/or toconvey electric power to an electric actuator for operating the bucket38. In one embodiment, the conduits 140 are supported in a cartridgethat is removably coupled to the handle arm 86, similar to the cartridgedescribed in U.S. patent application Ser. No. 14/045,744, filed Oct. 3,2013, the entire contents of which are incorporated herein by reference.

FIGS. 5-7 illustrate multiple possible positions for the handle 34during operation of the shovel 10. The handle 34 rotates and movestranslationally with respect to the frame 18. The links 118, 122 definea first end of the support structure 46 coupled to the frame 18 and asecond end coupled to the handle 34. The distance between the first endand the second end is variable to accommodate the movement between thehandle 34 and the boom 26 during operation. As the handle 34 moves froma retracted portion (FIG. 5) to an extended position (FIG. 6), the links118, 122 move apart from one another, such that an included angle 142between the links 118, 122 increases. As the handle 34 moves toward theretracted position (FIG. 5), the links 118, 122 pivot toward oneanother, decreasing the angle 142. In addition, as the handle 34 movesfrom a lowered position (FIG. 6) to a raised position (FIG. 7), theangle 142 decreases. The articulation of the links 118, 122 accounts forany “slack” in the conduits 126 and reduces the likelihood that theconduits 126 will snag on nearby obstacles or structures. The conduitsupport structure 46 simplifies the complexity of conveying fluid acrossthe connection that permits rotational and translational movement of thehandle 34 relative to the boom 26, thereby providing pressurized fluid,electric power, or electrical signals to the attachment 38 throughoutthe full range of motion of the handle 34. Among other things, theconduit support structure 46 permits active control of the attachment'smovement, increasing the range of motion and efficiency of theattachment 38.

FIGS. 8 and 9 illustrate another embodiment of the conduit supportstructure 46 in which the first link 118 is shaped as a chevronincluding a pair of legs 118 a, 118 b having ends that are eachpivotably coupled to the base 22 at ball-in-socket joints. The legs 118a, 118 b are joined together at an apex and are coupled to the secondlink 122 at a joint 154. In the illustrated embodiment, the joint 154 isa pin connection; in other embodiments, the joint 154 may be a sphericalbearing, a ball-in-socket connection, or some other type of joint. Thechevron shape of the first link 118 distributes the stress in thecouplings and reduces wear on the first link 118.

In other embodiments, both the first link and the second link are formedas chevrons including a pair of legs and each leg of the second link ispivotably coupled to one of the handle arms 86. The support structure 46may include one first link and one second link that are pivotablycoupled by, for example, a single spherical or ball-in-socket connectionjoining the apex of each link.

FIGS. 10-12 illustrate another embodiment of a conduit support structure246. For brevity, only differences between the conduit support structure246 and the conduit support structure 46 will be described in detail.Similar parts are identified with the same reference number, plus 200.

As shown in FIGS. 10-12, a first link 318 is coupled to the saddle block78, while a second link 322 is coupled between the first link 318 and aportion of the handle 34 between the first end 90 and the second end 94.The first link 318 defines a first end of the support structure 246 thatis pivotably coupled to the top of the saddle block 78, and the secondlink 322 defines a second end of the support structure 246 that ispivotably coupled to the top of the handle 34. Both links 318, 322support fixed conduit portions for conveying hydraulic fluid,lubricative fluid, and/or electrical wire.

As shown in FIG. 11, the conduits 326 include a flexible portionextending in a curved, S-shape manner from the base 22 along a sidesurface of the saddle block 78 to the first link 318. As in theembodiment of FIG. 1, a flexible portion extends around the jointbetween the first link 318 and the second link 322. The conduits 326include both fluid lines for conveying pressurized fluids and electricallines. In the illustrated embodiment, the conduits 326 extend below theend of the second link 322 that is coupled to the handle 34. Theconduits 326 extend along an upper edge of the handle 34 to a manifold(not shown) positioned on the rear wall 106 of the bucket 38. Fluid(e.g., hydraulic fluid, lubricative fluid) is conveyed to the manifoldwhere it is then diverted to the pivot actuators 42 or mechanicalconnections.

As best shown in FIG. 12, the first link 318 is pivotably coupled to thesaddle block 78 by a pin joint or a cylindrical bushing, while thesecond link 322 is pivotably coupled to the arm 86 of the handle 34 by auniversal joint or U-joint. The U-joint includes a first portion thatpivots about a first axis and a second portion that pivots about asecond axis that is generally perpendicular to the first axis. Thestructure of a universal joint is well-known to a person of ordinaryskill, and therefore is not described in further detail. In addition,the pivot joint between the first link 318 and the second link 322 is aspherical coupling. As used herein, a spherical coupling may include acylindrical pin extending between the ends of the first link 318 and thesecond link 322 and encapsulated within one or more spherical bushingsthat are pivotable relative to a first link 318 and the second link 322.In other embodiments, the spherical coupling includes a ball-in-socketconnection. In still other embodiments, the spherical coupling includesa roller bearing having a plurality of roller elements with a sphericalshape or aspect. The types of couplings described above can beincorporated into any of the connection joints in the support structure246. For example, the connection between the second link 322 and thehandle arm 86 could be a cylindrical pin joint instead of a U-joint.

FIGS. 13 and 14 illustrate another embodiment in which the first link318 is pivotably coupled to a side of the saddle block 78 by a firstrotary union or fluid swivel 360 in fluid communication with the fluidsource 30 (not shown). The second link 322 is pivotably coupled to theside of the handle 34 at a second rotary union 364. The swivels 360, 364convey fluid through the pivoting joints to the conduits 326 on thelinks 318, 322. In other embodiments, the first link 318 is coupled tothe shipper shaft 74 and the second link 322 is coupled between thefirst link 318 and the handle 34.

FIGS. 15 and 16 illustrate another embodiment of a conduit supportstructure 446. For brevity, only differences between the conduit supportstructure 446 and the conduit support structure 46 will be described indetail. Similar parts are identified with the same reference number,plus 400.

As shown in FIGS. 15 and 16, the conduit support structure 446 includesa third link 572 coupled between a first link 518 and a second link 522.Conduits 526 are not coupled to the third link 572. The third link 572provides a minimum distance between the ends of the first link 518 andthe second link 522, preventing the conduit 526 from bending beyond aminimum bend radius.

FIGS. 17-19 illustrate another embodiment of a conduit support structure646. For brevity, only differences between the conduit support structure646 and the conduit support structure 46 will be described in detail.Similar parts are identified with the same reference number, plus 600.

Referring to FIG. 17, a first link 718 is pivotably coupled to the boom26 and a second link 722 is pivotably coupled between the first link 718and a portion of the handle 34 at a position between the first end 90and the second end 94. In one embodiment, the first link 718 ispivotable through approximately 110 degrees, the second link 722 ispivotable through approximately 70 degrees, and the total rotationbetween the links 718, 722 is approximately 100 degrees. In theillustrated embodiment, the first link 718 is coupled to the boom 26 ata first swivel 760, which is in communication with the fluid source 30,while the second link 722 is coupled to the handle 34 by a second swivel764. In other embodiments, the links 718, 722 may be coupled to the boom26 and handle 34, respectively, by pin joints or another type ofmechanical connection. The conduit support structure 646 may use one ortwo collinear pivot points on each of the boom 26 and the handle 30.

The conduit support structure 646 provides a path for fluid lines toconnect directly between the boom 26 and the handle 30, and the links718 and 722 have a shorter length than the links in the embodimentsdescribed above. In other embodiments, the pivot point of the first link718 relative to the boom 26 may be located at a different position,including on the bottom of the boom 26, underneath the handle 30, orprotruding from a side of the boom 26.

FIGS. 20 and 21 illustrate another embodiment of a conduit supportstructure 846. For brevity, only differences between the conduit supportstructure 846 and the conduit support structure 46 will be described indetail. Similar parts are identified with the same reference number,plus 800.

In the illustrated embodiment, at least one conduit 926 is in fluidcommunication with a fluid source 830. The conduits 926 include aflexible portion 976 extending from the base 22 to the second end 94 ofthe handle 34, where the conduits 926 are in fluid communication withconduits 140 extending along the handle 34. The flexible portion 976generally maintains a partially circular profile or loop shape in orderto accommodate rotational and translational movement of the handle 34relative to the boom 26.

In addition, each end of the flexible portion 976 is supported away fromthe coupling between the conduits 926 and the base 22 and the couplingbetween the conduits 926 and the handle 34. In the embodimentillustrated in FIG. 18, the support structure 846 also includes a firstsupport block 944 coupled to the base 22 and a second support block 948coupled to the second end 94 of each handle arm 86. Each support block944, 948 supports a portion of each conduit 926 against the lateral andtorsional forces exerted on the conduit 926 due to the movement of thehandle 34, thereby reducing stress and wear on the conduits 926 andtheir associated fittings.

The flexible portion 976 has a length that is sufficient to accommodateany position/movement of the second end 94 of the handle 34. Theflexible conduit 976 is coupled directly to the second end 94 of thehandle 34, thereby reducing the range that the conduit 976 mustaccommodate. In one embodiment, the flexible portion 976 is long enoughto accommodate the handle 34 and bucket 38 being positioned in a tuckposition in which the bucket 38 is retracted inwardly to engage thefront of the boom 26 proximate the base 22, and the handle 34 is fullyretracted and rotated to a substantially vertical orientation.

In other embodiments, the conduit support structure 846 includes a cabletrack (not shown) that at least partially supports the flexible portion976. The cable track allows movement of the conduits 926 within adefined range and guides the motion of the flexible portion 976 inresponse to motion of the handle 34. In other embodiments, the flexibleportion 976 is supported by, for example, a spring.

It is understood that features disclosed in one embodiment above areequally applicable to the other embodiments.

Thus, the invention provides, among other things, a conduit supportstructure for an industrial machine. Although the invention has beendescribed in detail with reference to certain preferred embodiments,variations and modifications exist within the scope and spirit of one ormore independent aspects of the invention as described. Various featuresand advantages of the invention are set forth in the following claims.

The invention claimed is:
 1. An industrial machine comprising: a frameincluding a base and a boom, the boom having a first end coupled to thebase and a second end opposite the first end, the frame furtherincluding a saddle block pivotably coupled to the boom about an axispositioned between the first end and the second end of the boom; an armmovably coupled to the boom and including a first end and a second end,the arm supported by the saddle block for movement relative to the boom;an attachment coupled to the first end of the arm; a conduit extendingbetween the frame and the attachment; a first member pivotably coupledto the saddle block and supporting a first portion of the conduit as thearm moves relative to the boom; and a second member pivotably coupledbetween the first member and the arm and supporting a second portion ofthe conduit as the arm at least rotates relative to the boom.
 2. Theindustrial machine of claim 1, wherein the first member is pivotablycoupled to the second member at a joint, wherein the conduit includes aflexible portion extending around the joint and defining a bend radius,wherein the bend radius of the flexible portion remains above apredetermined minimum level.
 3. The industrial machine of claim 1,further comprising a third member pivotably coupled to and extendingbetween the first member and the second member.
 4. The industrialmachine of claim 1, wherein the first member is coupled to a top surfaceof the saddle block and the second member is coupled between the firstmember and a top surface of the arm.
 5. The industrial machine of claim1, wherein the second member pivots relative to the first member about afirst axis, and wherein the second member includes a first portion and asecond portion pivotably coupled to the first portion, the secondportion pivoting relative to the first portion about a second axis thatis not parallel to the first axis.
 6. The industrial machine of claim 1,wherein the frame supports a fluid source, wherein the conduit is afluid conduit providing fluid communication between the fluid source andthe attachment.
 7. The industrial machine of claim 6, wherein theconduit provides a lubricative fluid to a mechanical coupling on atleast one of the attachment and the arm.
 8. The industrial machine ofclaim 6, wherein the attachment includes a bucket coupled to the firstend of the arm and an actuator for actuating the bucket, wherein theconduit provides pressurized fluid from the fluid source to theactuator.